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| Topic: |
Science
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| Number of pages / Number of words: |
10 / 2638 |
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Due to the ineffectiveness of Wheeling's idea and to the concurrent introduction of Edison's highly successful incandescent light bulb, the concept of piping light never took off.
That same year, Alexander Graham Bell developed an optical voice transmission system he called the photophone. The photophone used free-space light to carry the human voice 200 meters...
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The photophone used free-space light to carry the human voice 200 meters. Specially placed mirrors reflected sunlight onto a diaphragm attached within the mouthpiece of the photophone. At the other end, mounted within a parabolic reflector, was a light-sensitive selenium resistor. This resistor was connected to a battery that was, in turn, wired to a telephone receiver...
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Dense Wavelength Division Multiplexing
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"More light and light, more dark and dark our woes".
Light
Best Possible Light
And God said, "Let there be light"
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